My favorite protagonist is Jack Ryan. He is the main character in some of the books by Tom Clancy, my favorite author. Jack Ryan is honest, determined, and gets things done effectively. He doesn't succumb to political pressure, even while president, twice. He does a multitude of things from averting a nuclear crisis, to fixing the stock market, to defending his house from terrorists, all the way to help a soviet submarine defect to the U.S. Very exciting and intriguing, Jack Ryan is one of the most well-rounded protagonists I have encountered.